Myopia control lens with aspheric surface to create peripheral defocus

ABSTRACT

A myopia control lens with aspheric surface to create peripheral defocus onto varies regions of a retina is disclosed. This lens includes a central optical zone and varies of asymmetrical peripheral optical zones surrounding the central optical zone. Varies regions of asymmetric periphery optical zones create different amounts of blur surrounding a central area. The outer peripheral surface consists of different regions and different amounts of asymmetrical aspheric, so that light passing the peripheral optical zones can create different amounts of peripheral blurring areas in front of different areas of the retina; this defocusing of the images, providing more controlled amount of myopic blur to the retina, which acts as a putative cue to slow myopic eye growth.

This application claims the priority benefit of Taiwan patent application number 106217150, filed on Nov. 17, 2018.

BACKGROUND OF THE INVENTION 1. Field of the Invention

The present invention generally relates to myopia control lens with aspheric surface to create peripheral defocus. More particularly, an outer surface of a peripheral optical zone of the myopia control lens is asymmetrical aspheric, the asymmetrical aspheric outer surface is used to effectively control myopia progression, thereby slowing or retarding myopia progression, and correct myopia in children/adolescents optically at the same time.

2. Description of the Related Art

Electronic Product Development connect people's daily lives to technology and enhance lifestyle/convenience. Especially the heavy use of computers, communications, and consumer (3C) electronic products results in the popularization of communication and internet technology applications. Many people immerse themselves in the use of 3C electronic products. Mobile phone overuse is seen among certain office workers, students, middle aged and elderly people. People everywhere are beginning to lose patience with the phenomenon known as phubbing: snubbing others in a social setting by checking your phone. Mobile phone overuse can also lead to vision impairment. The result of King's College London study from 2015, exploring the possible link between increased computer and smartphone use and rising rates of myopia.

The general way of correcting myopia is wearing glasses, such as eyeglasses or contact lenses. In configuration of the eyeglass lens or the contact lens for correcting myopia, an inner surface and the outer surface of a central optical zone and the peripheral optical zone of the lens have different curvatures, so that light from an external object can clearly focus on a retina of the eyeball without distortion through the central optical zone, and light passing the peripheral optical zone can focus on a predetermined viewpoint in front of the retina; as a result, the eyeglasses lens or contact lenses can provide a clear image in the center of the visual field of the eye, since the minus power of the peripheral optical zone is less than the center optical zone, thereby slowing or retarding myopia progression, and correct myopia in children/adolescents optically at the same time. The peripheral optical zone of the conventional lens for correcting myopia has a single curvature and a predetermined minus power less than the power of the central optical zone, but eyeball and retina are essentially asymmetrical, so the distances from the peripheral optical zone of the eyeglass lens or the contact lens to the retina at different positions are actually not the same.

Therefore, what is needed is to develop myopia control lens to solve the problem that the conventional lens is unable to achieve the desired effect of reducing or retarding myopia progression because the peripheral optical zone of conventional lens cannot fit the position and shape of the wearer's retina.

SUMMARY OF THE INVENTION

In order to solve the conventional problems, the inventor develops the myopia control lens with aspheric surface to create peripheral defocus according to collected data, multiple tests and modifications, and years of experience in the industry.

The primary objective of the present invention is that the myopia control lens includes a central optical zone and varies of asymmetrical peripheral optical zones surrounding the central optical zone. Varies regions of asymmetric periphery optical zones create different amounts of blur surrounding a central area. The outer peripheral surface consists of different regions and different amounts of asymmetrical aspheric, so that light passing the peripheral optical zones can create different amounts of peripheral blurring areas in front of different areas of a retina; this defocusing of the images, providing more controlled amount of myopic blur to the retina, which acts as a putative cue to slow myopic eye growth. Following animal studies that have demonstrated the strong inhibitory effect of peripheral myopic defocus on axial length elongation or myopia development, it has been hypothesized that inducing myopic retinal defocus may slow or retard the progression of myopia in children. Contact lenses provide the most viable opportunity to beneficially modify genetics and environment factors through their close alignment with the eye and consistent wearing time. The present invention will induce myopic retinal defocus by the asymmetrical aspheric surface of the lens to create different amounts of peripheral defocus onto varies regions of the retina, which acts as a putative cue, further, a ciliary muscle can be relaxed by putative cue, so that a intraocular lens can become flatter and the light passing the peripheral optical zone can be imaged on the retina, thereby preventing the ciliary muscle of the eye ball from staying at the tight state for a long time and slowing myopic eye growth.

The secondary objective of the present invention is that the inner surface of the myopia control lens is the spherical, and the process of fitting and producing the lens can be simpler, thereby achieving the purpose of improving product yield.

BRIEF DESCRIPTION OF THE DRAWINGS

The structure, operating principle and effects of the present invention will be described in detail by way of various embodiments which are illustrated in the accompanying drawings.

FIG. 1 is a schematic view of optical paths of the present invention.

FIG. 2 is a schematic plan view of myopia control lens of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The following embodiments of the present invention are herein described in detail with reference to the accompanying drawings. These drawings show specific examples of the embodiments of the present invention. It is to be understood that these embodiments are exemplary implementations and are not to be construed as limiting the scope of the present invention in any way. Further modifications to the disclosed embodiments, as well as other embodiments, are also included within the scope of the appended claims. These embodiments are provided so that this disclosure is thorough and complete, and fully conveys the inventive concept to those skilled in the art. Regarding the drawings, the relative proportions and ratios of elements in the drawings may be exaggerated or diminished in size for the sake of clarity and convenience. Such arbitrary proportions are only illustrative and not limiting in any way. The same reference numbers are used in the drawings and description to refer to the same or like parts.

It is to be understood that, although the terms ‘first’, ‘second’, ‘third’, and so on, may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only for the purpose of distinguishing one component from another component. Thus, a first element discussed herein could be termed a second element without altering the description of the present disclosure. As used herein, the term “or” includes any and all combinations of one or more of the associated listed items.

It will be understood that when an element or layer is referred to as being “on,” “connected to” or “coupled to” another element or layer, it can be directly on, connected or coupled to the other element or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being “directly on,” “directly connected to” or “directly coupled to” another element or layer, there are no intervening elements or layers present.

In addition, unless explicitly described to the contrary the word “comprise” and variations such as “comprises” or “comprising”, will be understood to imply the inclusion of stated elements but not the exclusion of any other elements.

Please refer to FIGS. 1 and 2, which are schematic view of optical paths of the present invention, and schematic plan view of the present invention. In an embodiment, the myopia control lens 1 can be a lens 1 of a contact lens or the lens 1 of an eyeglass. As shown in FIGS. 1 to 2, the lens 1 comprises an outer surface 11 and an inner surface 12, and a central optical zone 13 is formed on the outer surface 11 and the inner surface 12 and configured to pass light to focus on a central area 211 of a retina 21 of a wearer's eye ball 2. For example, the central area 211 can be the fovea of the retina 21. Furthermore, the lens 1 includes a peripheral optical zone 14 surrounding the central optical zone 13 and configured to pass light to focus on a peripheral blurring area 212 around the central area 211; for example, the peripheral blurring area 212 surrounds the fovea. Furthermore, the lens 1 includes a non-optical zone 15 which is formed around the peripheral optical zone 14.

In an embodiment, the inner surface 12 of the lens 1 is spherical, and the outer surface 11 of the central optical zone 13 of lens 1 is aspheric, and the outer surface 11 of the peripheral optical zone 14 is asymmetrical aspheric.

The eccentricity of the outer surface 11 of the peripheral optical zone 14 can vary in different position, that is, the eccentricity of A point on the outer surface 11 is different from the eccentricity of B point on the outer surface 11, so as to make the outer surface 11 asymmetrical aspheric. In an embodiment, the lens power of the peripheral optical zone 14 of the lens 1 is in a range of 0.00 diopter to −20.00 diopter, and the eccentricity of the peripheral optical zone 14 is in a range of 0 to −1.740.

The eccentricity of the outer surface 11 of the central optical zone 13 must be less than the eccentricity of the outer surface 11 of the peripheral optical zone 14, and the peripheral optical zone 14 can have more relative positive power than the central optical zone 13. Furthermore, the outer surfaces 11 of the central optical zone 13 and the peripheral optical zone 14 can be combined integrally through a joint section 131, and the eccentricity of the joint section 131 is between the eccentricity of the central optical zone 13 and the eccentricity of the peripheral optical zone 14.

In order to correct myopia, that is, the axial length of the user's eye ball 2 is too long, the user can wear the myopia control lens 1 first, light passing the central optical zone 13 of the lens 1 can focus on the central area 211 of the retina 21 of the eye ball 2, and light passing the peripheral optical zone 14 of the lens 1 can focus in front of the peripheral blurring area 212 of the retina 21 because the peripheral optical zone 14 has relative positive power than the central optical zone 13 and the asymmetrical aspheric of the outer surface 11 of the peripheral optical zone 14; at this time, light passing the peripheral optical zone 14 of the lens 1 can focus in front of the peripheral blurring area 212 of the retina 21 and can be used for defocusing the image and provide myopic blur to the retina, which acts as a putative cue, further, a ciliary muscle 22 can be relaxed by putative cue, so that a intraocular lens 23 can become flatter and the light passing the peripheral optical zone 14 can be imaged on the retina 21, thereby preventing the ciliary muscle 22 of the eye ball 2 from staying at the tight state for a long time and slowing myopic eye growth.

The inner surface 12 of the lens 1 is spherical, so the process of fitting and producing the lens 1 can be simpler, thereby achieving the effect of improving product yield.

The above-mentioned content is merely for illustration of preferred embodiment of the present invention, the scope of claim of the present invention is not limited thereto. The main concept of the present invention is that the outer surface 11 of the peripheral optical zone 14 of the lens 1 is asymmetrical aspheric, and the asymmetrical aspheric outer surface 11 can be used to create different amounts of blur surrounding the central area to effectively control myopia, and effectively slow myopia progression optically, thereby achieving effect of correcting myopia. It should be noted that various equivalent structural changes, alternations or modifications based on the descriptions and figures of present invention to achieve aforementioned effect, are all consequently viewed as being embraced by the spirit and the scope of the present disclosure set forth in the claims.

The present invention disclosed herein has been described by means of specific embodiments. However, numerous modifications, variations and enhancements can be made thereto by those skilled in the art without departing from the spirit and scope of the disclosure set forth in the claims. 

1. A myopia control lens with aspheric surface to create peripheral defocus, and the myopia control lens comprising: an outer surface; an inner surface; a central optical zone formed on the outer surface and the inner surface and configured to pass light to clearly focus on a central area of a retina of the eyeball; and varies of asymmetrical peripheral optical zones surrounding the central optical zone and varies regions of asymmetric periphery optical zones create different amounts of blur surrounding the central area and configured to pass light to focus on a peripheral blurring area around the central area; wherein the outer peripheral surface consists of different regions and different amounts of asymmetrical aspheric, so that light passing the peripheral optical zones can create different amounts of peripheral blurring areas in front of different areas of the retina.
 2. The myopia control lens according to claim 1, wherein the myopia control lens is a lens of a contact lens or a lens of an eyeglass.
 3. The myopia control lens according to claim 1, wherein the inner surface is spherical.
 4. The myopia control lens according to claim 1, wherein the outer surface of the central optical zone is aspheric.
 5. The myopia control lens according to claim 1, further comprising a non-visual area surrounding the peripheral optical zone.
 6. The myopia control lens according to claim 1, wherein eccentricity of the outer surface of the central optical zone is less than eccentricity of the outer surface of the peripheral optical zone.
 7. The myopia control lens according to claim 1, wherein the lens power of the peripheral optical zone is in range of 0.00 diopter to −20.00 diopter, and the eccentricity of the outer surface of the peripheral optical zone is in range of 0 to −1.740.
 8. The myopia control lens according to claim 1, further comprising a joint section jointed between the outer surfaces of the central optical zone and the peripheral optical zone, and eccentricity of the joint section is between the eccentricity of the outer surface of the central optical zone and the eccentricity of the outer surface of the peripheral optical zone. 